OpenCart Porting Code From One Build to Another

We have an existing OpenCart build (HOMEKO) that is using a custom plugin to alter the behavior of sub-categories which is working well @ [login to view URL] We have another OpenCart build that is very similar (COUREY), but for which the plugin is not behaving properly @ [login to view URL] The issues are: 1. KITCHEN > SUB-CATEGORIES - the listings at the top of the page 'Accessories - Decorative Wall Panel', 'Accessories, Dishwasher panel', etc. should not appear as boxes at the top, they should only appear in the table below 'Start Shopping' 2. PRICING - there is one additional custom feature of the COUREY build which requires that users must be logged in in order to see pricing. This is already in place for all normal item pricing, but the 'Starting at $X.XX...' is appearing for each item on under 'Start Shopping'. If a user is not yet logged in, it should state 'Login to view pricing' instead, with the word 'Login' linked to the login page. Once the user is logged in, then the 'Starting at...' pricing would appear with the correct pricing structure for that customer. Please note that no custom development should be required, but rather need to compare/port over the changes from one build to the other. Looking for quick turnaround, and can make immediate payment for deposit/completion.